California (Los Angeles)
September
Weather in California for September 2025
Your guide to California weather in September - trends and predictions
In general, the average temperature in California at the beginning of September is 32.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 27.7 °F by the end of September.
Precipitation in California during September is a rare event, with an average of fewer than 2 rainy days.
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Temperatures
Rain 🌧️
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29
Dry days
1
Rainy days
0
Snow days
29°/19°
Temperatures
16 km/h
Avg max wind
55 %
Avg humidity
California in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  30° | 2 30° | 3 31° | 4 33° | 5 35° | 6 33° | 7 34° |
| 8 35° | 9 36° | 10 31° | 11 31° | 12 30° | 13 28° | 14 28° |
| 15 27° | 16 26° | 17 25° | 18 25° | 19 24° | 20 26° | 21 26° |
| 22 28° | 23  29° | 24 28° | 25 29° | 26 27° | 27 28° | 28 28° |
| 29 27° | 30 27° |
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Temperatures trend during September in California
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 30° /20° | 0 mm | 8 | |
| Sept. 2 | Sunny | 30° /20° | 0 mm | 8 | |
| Sept. 3 | Sunny | 31° /20° | 0 mm | 8 | |
| Sept. 4 | Sunny | 33° /21° | 0.2 mm | 8 | |
| Sept. 5 | Sunny | 35° /22° | 0 mm | 8 | |
| Sept. 6 | Sunny | 33° /22° | 0 mm | 8 | |
| Sept. 7 | Sunny | 34° /21° | 0 mm | 8 | |
| Sept. 8 | Sunny | 35° /23° | 0 mm | 9 | |
| Sept. 9 | Sunny | 36° /24° | 3.2 mm | 8 | |
| Sept. 10 | Sunny | 31° /22° | 0.3 mm | 7 | |
| Sept. 11 | Sunny | 31° /21° | 0.1 mm | 7 | |
| Sept. 12 | Sunny | 30° /20° | 0.2 mm | 7 | |
| Sept. 13 | Sunny | 28° /19° | 0 mm | 7 | |
| Sept. 14 | Sunny | 28° /18° | 0 mm | 7 | |
| Sept. 15 | Sunny | 27° /17° | 0 mm | 7 | |
| Sept. 16 | Sunny | 26° /17° | 0.1 mm | 6 | |
| Sept. 17 | Sunny | 25° /16° | 0 mm | 7 | |
| Sept. 18 | Sunny | 25° /16° | 0.2 mm | 6 | |
| Sept. 19 | Sunny | 24° /17° | 0 mm | 6 | |
| Sept. 20 | Sunny | 26° /16° | 0 mm | 6 | |
| Sept. 21 | Sunny | 26° /16° | 0.1 mm | 6 | |
| Sept. 22 | Sunny | 28° /17° | 0 mm | 7 | |
| Sept. 23 | Partly cloudy | 29° /18° | 0 mm | 7 | |
| Sept. 24 | Sunny | 28° /17° | 0 mm | 7 | |
| Sept. 25 | Sunny | 29° /17° | 0 mm | 7 | |
| Sept. 26 | Sunny | 27° /17° | 0 mm | 6 | |
| Sept. 27 | Sunny | 28° /17° | 0 mm | 7 | |
| Sept. 28 | Partly cloudy | 28° /17° | 0 mm | 7 | |
| Sept. 29 | Partly cloudy | 27° /17° | 0 mm | 7 | |
| Sept. 30 | Sunny | 27° /16° | 0.5 mm | 7 | |
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Important Notice
Our weather forecast for California in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the California forecast closer to your planned date for the most up-to-date weather information.
California in September - FAQ
What are the expected maximum and minimum temperatures in California during September?
During September, expect a variety of temperatures with highs around 29° and lows near 19°, suitable for diverse activities and preferences.
How much rainfall should be expected in California during September?
Rainfall in California during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in California during September?
The average wind speed in California during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in California
Explore the daily rainfall trends and prepare for Californias September weather 💧
UV exposure in California during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Provinces in California
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Alameda CountyCity and County of San FranciscoFresno CountyInyo CountyKern CountyLos Angeles CountyMariposa CountyMonterey CountyOrange CountyPlacer CountyRiverside CountySacramento CountySan Bernardino CountySan Diego CountySan Joaquin CountySanta Clara CountySonoma CountyStanislaus CountyVentura County
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